From nobody Sun Sep 22 03:21:42 2024 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 71BFDC433EF for ; Thu, 16 Jun 2022 00:03:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1355329AbiFPADr (ORCPT ); Wed, 15 Jun 2022 20:03:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41270 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1350338AbiFPADZ (ORCPT ); Wed, 15 Jun 2022 20:03:25 -0400 Received: from NAM11-DM6-obe.outbound.protection.outlook.com (mail-dm6nam11on2048.outbound.protection.outlook.com [40.107.223.48]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5461C55374; Wed, 15 Jun 2022 17:03:23 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=QsapoHp95BrwQq1++W6LKY1tSu8JaAaMy6LoT5ZkqZJcUebnABlU0kupm+xOfqJeOT8JFhtsOBAfI+ne6pzooYbv0D3u4EmnQouJuBXQv/IG2W34/36KQi6Zf8QiOQLxe8bPqhREtiowCCVqDuNxLNUNyK1WfezwKoQp0eNi+PyspAkg+K6ArJCmBLZjb1/DydlF5VgIAbGC4MCJiHdHk0h2jpSMDaSlIYGHwmUo8YlPvgHQJqkVf3vprokAhtj0vYkS+D3r/BQLM6UgdNCmuGe8iOt5nDEEyquQ3kXjxKZj9xxoEG/PX4FFzIp8yfpcCbP6lumQt+BF5jRe7hb4cw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=wvw7R2wVvGJfgqslMD1pbelLjoj3I35diURuODKN4DY=; b=d6Na1fABKMZRP9zwfGv7kD497gR7IJPjGm0AOhZaUSZimlNvzg43504wU/judKktO8rFFmIWFN1dmJsGo/rK5eixOv8PUjnGEa130MrzPzAq9JboBRox4+OSeK26mKl4Fn2Pg9Cw0jr9TR/Yfw9HaUggoiwyWguyquDw+qQEem8nJ5rKVK1ZQj5VdCgRtpU7EDhY792KZFWDJeQ5kZIdmivR7ZsaqKQix5mtQ5yPcim22rkq41+wXpnh7izapKqwrNqG72QAJNcHIk7dFFL3+5MnW9iGKCIy/ZRp+R7MUstA21gZbdCbbP9BT91sEg9i3aCjJ01p3pLOc3OY4eshSA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 12.22.5.236) smtp.rcpttodomain=linux.intel.com smtp.mailfrom=nvidia.com; dmarc=pass (p=reject sp=reject pct=100) action=none header.from=nvidia.com; dkim=none (message not signed); arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=Nvidia.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=wvw7R2wVvGJfgqslMD1pbelLjoj3I35diURuODKN4DY=; b=mL3YC3Hi9UrmL0xP6RIHyg4EpjqzDIR8pWHnPxwemNGTjtRXUMFlCESFrgZ6SjHlI9J0MpHMcefC3lnmHZsSYrv0JQoKPkyoT2fbSkzzG+f6GLeAjzyHvyFCYKD08jUGX7dZjXdiJMcUJ6/Vb88x6tGxHKR16sHvHK2Kdsmh870Sh7SioHLPFMDLlY2EaCj+erlPDXZTSPp5p+ilM9KhjVtURGbS7G610Vf4YWSOmi/1DISqueGcSqfVptGGAHZCCqMDEJsz9zTJp9qXGR80jRb7Qmzo+m0IBMo+rQg2lpn19EcZMNrfLZsjJF6Esz3/B77zLYiAuUSQHRaBGEPvuw== Received: from MWHPR18CA0028.namprd18.prod.outlook.com (2603:10b6:320:31::14) by BY5PR12MB4162.namprd12.prod.outlook.com (2603:10b6:a03:201::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5332.15; Thu, 16 Jun 2022 00:03:20 +0000 Received: from CO1NAM11FT020.eop-nam11.prod.protection.outlook.com (2603:10b6:320:31:cafe::7c) by MWHPR18CA0028.outlook.office365.com (2603:10b6:320:31::14) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5353.14 via Frontend Transport; Thu, 16 Jun 2022 00:03:20 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 12.22.5.236) smtp.mailfrom=nvidia.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=nvidia.com; Received-SPF: Pass (protection.outlook.com: domain of nvidia.com designates 12.22.5.236 as permitted sender) receiver=protection.outlook.com; client-ip=12.22.5.236; helo=mail.nvidia.com; pr=C Received: from mail.nvidia.com (12.22.5.236) by CO1NAM11FT020.mail.protection.outlook.com (10.13.174.149) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.20.5332.12 via Frontend Transport; Thu, 16 Jun 2022 00:03:19 +0000 Received: from drhqmail202.nvidia.com (10.126.190.181) by DRHQMAIL109.nvidia.com (10.27.9.19) with Microsoft SMTP Server (TLS) id 15.0.1497.32; Thu, 16 Jun 2022 00:03:19 +0000 Received: from drhqmail201.nvidia.com (10.126.190.180) by drhqmail202.nvidia.com (10.126.190.181) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.22; Wed, 15 Jun 2022 17:03:18 -0700 Received: from Asurada-Nvidia.nvidia.com (10.127.8.11) by mail.nvidia.com (10.126.190.180) with Microsoft SMTP Server id 15.2.986.22 via Frontend Transport; Wed, 15 Jun 2022 17:03:17 -0700 From: Nicolin Chen To: , , , , , , , , , , , , , , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v2 4/5] vfio/iommu_type1: Clean up update_dirty_scope in detach_group() Date: Wed, 15 Jun 2022 17:03:03 -0700 Message-ID: <20220616000304.23890-5-nicolinc@nvidia.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220616000304.23890-1-nicolinc@nvidia.com> References: <20220616000304.23890-1-nicolinc@nvidia.com> MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 6969c3fa-2622-4090-8f29-08da4f2b9f10 X-MS-TrafficTypeDiagnostic: BY5PR12MB4162:EE_ X-Microsoft-Antispam-PRVS: X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:12.22.5.236;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:InfoNoRecords;CAT:NONE;SFS:(13230016)(4636009)(36840700001)(46966006)(40470700004)(81166007)(7406005)(1076003)(7696005)(2906002)(15650500001)(82310400005)(7416002)(5660300002)(26005)(36756003)(8936002)(4326008)(40460700003)(70586007)(8676002)(2616005)(508600001)(356005)(86362001)(110136005)(70206006)(186003)(83380400001)(316002)(921005)(6666004)(54906003)(47076005)(336012)(426003)(36860700001)(14143004)(2101003)(83996005)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 16 Jun 2022 00:03:19.5790 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 6969c3fa-2622-4090-8f29-08da4f2b9f10 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[12.22.5.236];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: CO1NAM11FT020.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BY5PR12MB4162 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" All devices in emulated_iommu_groups have pinned_page_dirty_scope set, so the update_dirty_scope in the first list_for_each_entry is always false. Clean it up, and move the "if update_dirty_scope" part from the detach_group_done routine to the domain_list part. Rename the "detach_group_done" goto label accordingly. Suggested-by: Jason Gunthorpe Signed-off-by: Nicolin Chen Reviewed-by: Kevin Tian , with one nit: --- drivers/vfio/vfio_iommu_type1.c | 27 ++++++++++++--------------- 1 file changed, 12 insertions(+), 15 deletions(-) diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type= 1.c index 11be5f95580b..573caf320788 100644 --- a/drivers/vfio/vfio_iommu_type1.c +++ b/drivers/vfio/vfio_iommu_type1.c @@ -2453,14 +2453,12 @@ static void vfio_iommu_type1_detach_group(void *iom= mu_data, struct vfio_iommu *iommu =3D iommu_data; struct vfio_domain *domain; struct vfio_iommu_group *group; - bool update_dirty_scope =3D false; LIST_HEAD(iova_copy); =20 mutex_lock(&iommu->lock); list_for_each_entry(group, &iommu->emulated_iommu_groups, next) { if (group->iommu_group !=3D iommu_group) continue; - update_dirty_scope =3D !group->pinned_page_dirty_scope; list_del(&group->next); kfree(group); =20 @@ -2469,7 +2467,7 @@ static void vfio_iommu_type1_detach_group(void *iommu= _data, WARN_ON(iommu->notifier.head); vfio_iommu_unmap_unpin_all(iommu); } - goto detach_group_done; + goto out_unlock; } =20 /* @@ -2485,9 +2483,7 @@ static void vfio_iommu_type1_detach_group(void *iommu= _data, continue; =20 iommu_detach_group(domain->domain, group->iommu_group); - update_dirty_scope =3D !group->pinned_page_dirty_scope; list_del(&group->next); - kfree(group); /* * Group ownership provides privilege, if the group list is * empty, the domain goes away. If it's the last domain with @@ -2510,6 +2506,16 @@ static void vfio_iommu_type1_detach_group(void *iomm= u_data, vfio_iommu_aper_expand(iommu, &iova_copy); vfio_update_pgsize_bitmap(iommu); } + /* + * Removal of a group without dirty tracking may allow + * the iommu scope to be promoted. + */ + if (!group->pinned_page_dirty_scope) { + iommu->num_non_pinned_groups--; + if (iommu->dirty_page_tracking) + vfio_iommu_populate_bitmap_full(iommu); + } + kfree(group); break; } =20 @@ -2518,16 +2524,7 @@ static void vfio_iommu_type1_detach_group(void *iomm= u_data, else vfio_iommu_iova_free(&iova_copy); =20 -detach_group_done: - /* - * Removal of a group without dirty tracking may allow the iommu scope - * to be promoted. - */ - if (update_dirty_scope) { - iommu->num_non_pinned_groups--; - if (iommu->dirty_page_tracking) - vfio_iommu_populate_bitmap_full(iommu); - } +out_unlock: mutex_unlock(&iommu->lock); } =20 --=20 2.17.1